VLBA obs. of radio reference frame sources. III. : J/ApJS/128/17


Authors : Fey A.L. orcid , Charlot P. (hide) , Charlot P. et..al

Bibcode : 2000ApJS..128...17F (ADS) (Simbad) (Objects) (hide)

CDS Keywords : Galaxies, radio; QSOs; Morphology
UAT : Radio galaxies, Quasars, Galaxy classification systems

Observation (OC)

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Inserted into VizieR : 26-Oct-2000
Last modification : 31-Dec-2002

VLBA observations of radio reference frame sources. III. Astrometric suitability of an additional 225 sources. (2000)

Keywords : astrometry - quasars general - radio continuum: galaxies - surveys

Abstract:We present simultaneous dual-frequency Very Long Baseline Array 2 and 8 GHz observations of 225 of the 560 extragalactic sources for which positions were reported by Johnston and coworkers and which are now part of the International Celestial Reference Frame. These observations represent the third and final in a series of observations intended to obtain single-epoch images of the entire set of sources presented by Johnston and coworkers (1995, Cat. <J/AJ/110/880>) and, together with previously reported observations, bring the total number of sources observed to 389. As with previous papers in this series, we use these data to quantify the magnitude of the expected effect of intrinsic source structure on astrometric bandwidth synthesis Very ...(more)
Abstract: (hide)

  • J/AJ/110/880 : Radio reference frame (Johnston+ 1995)
  • I/251 : VLBI International Celestial Reference Frame (ICRF) (Ma+, 1997)

                
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